package com.sky.service.impl;

import com.alibaba.fastjson.JSON;
import com.alibaba.fastjson.JSONObject;
import com.sky.constant.MessageConstant;
import com.sky.dto.UserLoginDTO;
import com.sky.entity.User;
import com.sky.exception.LoginFailedException;
import com.sky.mapper.UserMapper;
import com.sky.properties.WeChatProperties;
import com.sky.service.UserService;
import com.sky.utils.HttpClientUtil;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;

import java.time.LocalDateTime;
import java.util.HashMap;
import java.util.Map;

@Service
public class UserServiceImpl implements UserService {
    @Autowired
    private UserMapper userMapper;

    public static final String LOGIN_URL = "https://api.weixin.qq.com/sns/jscode2session";
    public static final String KEY = "openid";
    @Autowired
    private WeChatProperties properties;
    /**
     * 用户登录
     * @param userLoginDTO
     * @return
     */
    @Override
    public User login(UserLoginDTO userLoginDTO) {
        // 调用微信服务接口
        Map<String,String> map = new HashMap<>();
        map.put("appid", properties.getAppid());
        map.put("secret",properties.getSecret());
        map.put("js_code",userLoginDTO.getCode());
        map.put("grant_type","authorization_code");
        String json = HttpClientUtil.doGet(LOGIN_URL,map);
        // 获取openId
        JSONObject jsonObject = JSON.parseObject(json);
        String openId = jsonObject.getString(KEY);

        // 判断openId是否为空
        if (openId == null){
            throw new LoginFailedException(MessageConstant.LOGIN_FAILED);
        }

        // 判断用户是否为新用户
        User user = userMapper.getByOpenId(openId);
        // 如果是新用户，则自动注册
        if (user == null){
            user = User.builder().
                    openid(openId).
                    createTime(LocalDateTime.now()).
                    build();
            userMapper.insert(user);
        }
        // 返回用户参数
        return user;
    }
}
